Additional Stamp Impressions	Burelages	Design Prints	Embossings	Frankings	Margin Prints	Matrix Codes	Overprints	Postal Stationery Design Prints
Postal Stationery Form Prints	Postal Stationery Overprints	Print Substrates	Second Overprints	Silk Threads	Stamped Envelope Overprints	Stamp Impressions	Third Overprints	Watermarks

Knowledge / Differences / Silk Threads

Silk Thread Difference: common term for two the same postage stamps with no silk thread agreement

Silk Thread Position Difference: common term for two the same postage stamps with no silk thread position agreement

Silk Thread Quantity Difference: common term for two the same postage stamps with no silk thread quantity agreement (once or without silk thread)